My kid is an eater, so this might not be relevant to you... She eats about 5-6 oz of food at a sitting, plus water in a sippy. She still nurses almost as much as she used to- we seem to have dropped only one nursing session so far. I suggest making your own baby food. It's super easy. Pinterest has lots of recipe ideas. Making your own is super cheap too. Store purees in ice cube trays- which are about an ounce of food, then freeze. Once the food is frozen, run the back of the tray under hot tap water to release- and store food cubes in ziplocs. That way you can just thaw what you need- an ounce at a time. I microwave cubes for 45 seconds, stir and serve. I make lots of foods and just store until I need them. Makes it easy to store a variety!
Every kid is different- and he's still kinda young, I bet he'll like food more eventually- if he's still getting enough milk- don't worry- food is for fun right now anyway!